Multipolar radiofrequency ablation catheter which is applicable to being used in renal artery vessels

Abstract

The invention discloses a multipolar radiofrequency ablation catheter which is applicable to being used in renal artery vessels, comprising three parts of a catheter ablation working end, a main body section and a handle. The catheter ablation working end adopts a kinematic pair mechanism structure. The kinematic pair mechanism comprises a plurality of sets of single-unit front and back crank kinematic pairs. Each single-unit front and back crank kinematic pair is connected with a set of electrode tube and convex ring electrodes to constitute an independent or linked single-unit catheter ablation working end. A plurality of convex ring electrodes are evenly distributed the periphery of vessels and are closely attached to the inner wall of renal artery for mapping and ablation. The catheter of the invention has the advantages of simple and convenient operation, flexible adjustment, precise location of ablation, real-time monitoring and adjusting of ablation temperature and radio-frequency power, reducing treatment complication and lowering the surgical risk.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a multipolar radiofrequency ablation catheter suitable for renal arteries. Background technique [0002] Hypertension has the characteristics of high incidence, high awareness rate, and great harm. The American Heart Association (AHA) issued a scientific statement in 2008. Refractory hypertension is defined as; after lifestyle improvement, taking 3 different effects at the same time Mechanism of antihypertensive drugs (one of which is a diuretic), or at least 4 drugs are required to control systolic and diastolic blood pressure at target levels (<140 / 90 mmHg). At present, there is no accurate statistics on the incidence of resistant hypertension, but a number of clinical studies suggest that such patients account for 20%-30% of hypertensive patients. According to the 2007 China Cardiovascular Disease Report, there are at least 200 million hypertensive patients in my cou...

AI Technical Summary

Problems solved by technology

However, the Symplicity ablation catheter and treatment methods have the following shortcomings: 1) It is impossible to map the sympathetic nerve innervation points of the renal artery, and 6-8 points need to be randomly ablated to meet the requirements; 2) It is impossible to map the ablation status and judge the ablation effect; 3) The treatment When the ablation point is uneven, the ablation point may be repeated at the same point, and there is a risk of blood vessel perforation; 4) Too many ablation points will cause excessive scarring on the vessel wall, which may cause renal artery stenosis

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